 Okay, let's move on from the busy teacher to the useful files and this is where I just collect files that I think have been useful to me over the years and maybe to other people as well. Various Excel files that do different things with simulations of fencing and disimulation, geometric progressions, lotto analysis and so on. Further down I've collected a lot of data in Excel format so you are welcome to open any of these and if you find them useful. There are links to some other people who are also collecting Excel files from Mike Head and Mark Dabbs and Sydney Digital's data page. Further down I've collected all my data together in a zip file so if you click on that you should then open up a zip file which you can then extract and if you do so you can extract it to a folder called TSM data or call it what you like and here we have all the data. For example, belly button height, this is just some data from some children measuring their belly button height and their height but it's more fun to do it yourself really. Weight to Babies, this is harder data to get yourself so this is actually 1100 bits of data from Stanford University, birth weight, there's some interesting mathematics going on here to get pounds and ounces from birth weight and in gestation days mother's age is quite interesting and mother's height then it goes on to include whether the mother smoked or not and that's really quite interesting if a bit scary. Alright and then let's go back to here again and the other thing we've got is TSM images and these are very entertaining and quite wide ranging from a different number of sources. Some I've taken myself, some I've taken Alan Cantley and others but here we go. So let's just have a look at these, say you start off with the angles and lines and you can have a look at the door square in Spain which is quite a nice image with certainly a parabola there and the lines here, we're meeting in a vanishing point and Runway is always good fun, Coutineries, you've got Sydney Harbor Bridge, Time Bridge, St. Louis Arch and Wembley Arch and I doubt if any of these are parabolas they're nearly always upside down Coutineries but you never know. Lots of circular things here, Cobra Mist off near Albra, GCHQ building is quite interesting, there it is. The Horseshoe Curve in the States is a lovely railway track that goes right round a circle and quite a large radius too. Rainbows, they are in fact circular and there's a link here to someone who's managed to take a picture of an exact circle for a rainbow, fantastic. Otherwise there's rainbows like that but you can fit a circle too. And then you've got all the parabolic ones which are covered in another article in this MTI so I'll leave you to explore that on your own. Polygons, including the Pentagon and Xmouth Hexagon, this is an extraordinary array of aerals in Western Australia to explore, it's a real hexagon. Reflection, lots of lovely ideas here to do with red admirals and so on. And finally spirals and again that's mentioned in the MTI. So there are lots of things there in TSM images and TSM data. Further on down we've got some sketchpad files that I've extracted over the years to do a lot of simple geometry and I hope you'll enjoy that page of useful files.